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Bad top layer  

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Bryan34
(@bryan34)
Eminent Member
Bad top layer

What causes this?

Best Answer by Diem:

Warping, poor bed adhesion, or both.

Cheerio,

Publié : 18/02/2024 12:11 am
Bryan34
(@bryan34)
Eminent Member
Topic starter answered:
RE: Bad top layer

Publié : 18/02/2024 12:15 am
Diem
 Diem
(@diem)
Illustrious Member

Warping, poor bed adhesion, or both.

Cheerio,

Publié : 18/02/2024 8:45 am
Bryan34
(@bryan34)
Eminent Member
Topic starter answered:
RE: Bad top layer

That had not occurred to me. Would the mechanism be that the lower left corner raised up a little and the hot end is plowing through the previous layers? It looked like improper extrusion to me.

Publié : 18/02/2024 5:15 pm
Diem
 Diem
(@diem)
Illustrious Member

Yes, that would do it.

The first effect on warping is that the area of the upper layer reduces slightly and the filament for the intended area has to ripple up to fit ... then if the warping increases you do get plowing.  If the curl gets high enough it can cause a head crash which might knock the print off the sheet - or it might cause the print head to lose it's position resulting in layer shift.

Cheerio,

Publié : 18/02/2024 5:52 pm
Bryan34
(@bryan34)
Eminent Member
Topic starter answered:
RE: Bad top layer

Thanks for your help!

Publié : 18/02/2024 6:35 pm
Bryan34
(@bryan34)
Eminent Member
Topic starter answered:
RE: Bad top layer

Redo with a full coat of glue stick came out fine. You were right.

Posted by: @diem

Warping, poor bed adhesion, or both.

Cheerio,

 

Publié : 19/02/2024 7:50 pm
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